Sending commands via usb port?

i'm looking to send commands over a usb cable to a device via xcode or cocoa. i know leopard did away with rs232 commands, so i'm looking for some sample code that sends a command via objective-c over a usb cable.

From Cameron Forbes of US FTDI tech support:
Ed:
After you install the FTDI D2XX drivers for Mac OS X (Intel Macs):
http://www.ftdichip.com/Drivers/D2XX/MacOSX/UniBin/Universal%20D2XX0.1.4.dmg
Add the following links (from Mac OS X Installation Guide):
· Start a Terminal session (Go > Applications > Utilities > Terminal)
· Copy libftd2xx.0.1.0.dylib to the /usr/local/lib directory (cp Desktop/D2XX/bin/libftd2xx.0.1.0
/usr/local/lib)
· Change directory to the /usr/local/lib (cd /usr/local/lib)
· Create a symbolic link to the library (ln -sf libftd2xx.0.1.0.dylib libftd2xx.dylib)
The example code is located at:
/desktop/d2xx/Samples
Best Regards,
Cameron Forbes
Field Applications Engineer - Americas
[email protected]
Future Technology Devices International Ltd.
7235 NW Evergreen Parkway
Suite 600
Hillsboro, OR 97124-5803
Tel: 503.547.0988 xt 315
Fax: 503.547.0987
Practical USB Interface Solutions

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